Browse All Side Projects from Reddit

All Projects (4,116)

[Launch] I built a free race planner for trail and ultra runners. Launching it today, and I'd like b

Plan the climb. Nail the fuel. Send the trail.

Been building a different kind of project explorer: Sprout

Sprout is a tree command that understands projects. It respects .gitignore, marks changes and hotspots in place, shows pull requests as trees, suggests where to start reading, and gives AI agents a compact map with real signatures.

🎹 Free beta: a piano app that listens to you play and tells you if you hit the right note (and I'

Ever wanted to play your favorite song on the piano, then given up because the sheet music was impossible? I built Piano, a web app that walks you through each song step by step, and I'd love for you to try it. 🆓 It's free during the beta. Once it leaves beta it will cost $1, a simple one-time price with no confusing subscriptions. Anyone who joins now gets to try it for free and helps me polish it. What does it do? - 🎤 Listens to your piano through your microphone (or a USB MIDI k

polluSensWeb v2.2

Connect any UART pollution sensor straight in Chrome. Live PM1 / PM2.5 / PM10 charts, CSV export and webhook forwarding — zero installation.

I built a free site that ranks 36,000 fast-food menu items by protein — fully static, zero-cost in

Search 37007 fast-food menu items across 109 chains for calories, protein, carbs and fat. Filter by high-protein, keto, low-carb diets.

I made Emoji Trail, a free browser game where you turn emoji stories into sentences

Turn emoji clues into mini-stories using a shuffled word bank. Play 135 free puzzles, from Easy to Legendary, on your phone or computer. No signup.

I built a stack builder for developers and vibe coders — looking for feedback

AGENTS.md is a simple, open format for guiding coding agents. Think of it as a README for agents.

I built a Korean fortune-telling app where you can invite your crush into the same room and get your

Saju is how Koreans read a birth. See your eight characters free, ask about love, work and timing, get a Korean name, and see the K-stars who share yours.

I'm 17 and built a grade calculator for German high schoolers because nobody knows their own GPA unt

Kostenloser Notenrechner fürs 0–15-Punkte-System. Schnitt live berechnen, Punkte in Noten umrechnen — ohne Anmeldung.

I have been building an all in one platform for authors

A home for your craft. One home for your work, audience, and business on a site you own.

I built Otakana, a daily anime-name puzzle you can play in a browser

Otakana is a daily anime word-guessing game. Guess the character or term, learn something about the series, come back tomorrow.

I built an app that names every species in an underwater photo

Identify up to 10 underwater species in one dive photo, with a confidence score, recognition tips and fun facts. First identification free.

Stayed up til 3am trying to know whats in my skincare products too many times, made this

Every score traces back to published papers on the product's actives. See what was counted, and what was not.

My project idea: make a sandwich taller and more expensive forever

A francesinha coletiva que cresce uma camada por cada contribuição.

43 fois plus de chances d'avoir des leads. Voici ce que j'ai compris en bossant avec des garages de

Le simulateur de gains pour votre site de reprogrammation. Gestion clients, facturation, base véhicules. L'outil SaaS conçu pour les professionnels de la reprogrammation.

I built a self-hosted uptime monitor in Lua + SQLite on a Rust-based engine

Been building this on and off for a while and its finally ready, so here it is. UPTYME is self-hosted uptime monitoring that doesn't ask you to run Postgres, Node, Redis, or a six-container compose stack. It's a self-contained binary with SQLite baked in and runs on Linux, Mac or Windows Live demo: https://uptyme.spyweb.app/ (API key: demo) just run (linux/mac) curl -sSf https://uptyme.spyweb.app/setup | bash or windows powershell irm https://uptyme.spyweb.app/setup-win | iex (installer

Built a small tool for moving text between devices using short codes. Is this actually useful?

Move text, code, links and notes between your devices in seconds. Paste → Get a code → Enter it anywhere. No account. No install. Free.

Bible study workspace app, please give it a try.

Turn what you read into what you understand — on a canvas built for study.

I got tired of planning walking routes on vacation, so I built a "Tinder for POIs"

Create your own walking tours based on your time and preferences. Tell us how long you have and get a walking loop through places you'll like.

Misanthropic - An AI that tells you your idea is bad, you're worse, and to go f*** yourself

AI that's honest about how it feels about you.

I got tired of pinching and zooming the Umami dashboard on my phone, so I built a native app for it

Check your Umami analytics on iPhone or Android. Visitors, pageviews, realtime, goals, funnels and home screen widgets for self-hosted Umami and Umami Cloud.